Why is important to add a spin bar, spin vane or boiling stones to a mixture to be heated?These items have a higher heat capacity and absorb some of heat.O Some impurities absorb on these items.O They slow down the heating processO They increase the volume of the mixture and making it easier to heat a liquid mixture.O To reduce the bumpingthe mixture due to local overheating

Bumping of solution result in loss of solution.

Why is important to add a spin bar, spin vane or boiling stones to a mixture to be heated? These items have a higher heat capacity and absorb some of heat. Some impurities absorb on these items. They slow down the heating process O They increase the volume of the mixture and making it easier to heat a liquid mixture. To reduce the bumping of the mixture due to local overheating

Why is important to add a spin bar, spin vane or boiling stones to a mixture to be heated? These items have a higher heat capacity and absorb some of heat. Some impurities absorb on these items. They slow down the heating process O They increase the volume of the mixture and making it easier to heat a liquid mixture. To reduce the bumping of the mixture due to local overheating

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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How many CAL must be added to heat 399.9 g of water from -20.0oC to 95.0 oC ? Don't do the calculation, just indicate which conversion factors would be used Blank 1. Fill in the blank, read surrounding text. specific heat of the solid, 0.504 cal/goC Blank 2. Fill in the blank, read surrounding text. specific heat of the liquid, 0.999 cal/goC Blank 3. Fill in the blank, read surrounding text. specific heat of the gas, 0.497 cal/goC Blank 4. Fill in the blank, read surrounding text. heat of fusion, 79.7 cal/g Blank 5. Fill in the blank, read surrounding text. heat of vaporization, 539 cal/g a. used b. not used
1. Evaluate the change in temperature from point A to E, with regard to heat. 2. Draw the missing section of this heating curve on the graph and label the phase that best fits. Using the terms temperature and heat, justify (prove) your chosen phase.
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Show complete detail of solution and include the units.
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Sample A: 50 g of H2O (g) at 400 K and 1 atm is compressed until it condenses, then the liquid is cooſed to 300 K. Pressure is reduced to 1 atm while the temperature is maintained at 300 K Sample B: 50 g of H,O (s) at 200 K and 1 atm is heated to the melting point, and then the liquid water is fùrther heated to 300 K under 1 atm pressure Which water sample has the higher internal energy in the final state? A. Sample A B. Sample B C. Neither D. I don't know!
2 You may want to reference Section 3.7 (Pages 80-87) while completing this problem. Using the values for the heat of fusion, specific heat of water, and/or heat of vaporization, calculate the amount of heat energy in each of the following. Keep in mind that the sign of the heat involved in the state change is ignored. W Alt Jill # 3 F3 E x X C $ F4 4 R 8 % V SD F G 5 2 F5 5 HH T Fó Q Search 6 Y H 6 F7 ▼ & L Part A 7 Calculate the joules released when 145 g of steam condenses at 100 °C and the liquid cools to 35.0 °C. Express your answer to three significant figures and include the appropriate units. ASUS Value FB U HA Submit Previous Answers Request Answer * 56 X Incorrect; Try Again; 4 attempts remaining 8 BN M FO I J K D I 9 v → J 1 FIO Alt O D L BINET O ON/OFF Ctrl 0 ? P 10 : F12 I { Prt Sc [ A + = I Review | Constants | Periodic Table Insert } ] 165 Delete Backspace 1 Enter 12:06 AM 2/2/2023 ☺. ▷ Home Shift t PgUp O PgDn End Fn
5. How much heat does your skin give up if that heat is used to evaporate sweat? 6. How much heat does your window/air give up if heat is used to melt frost on the pane and then raise the temperature of the melted water? START: 5 gram of solid ice at -12°C END: 5 gram of water at 89°C START: 3 gram of water at 20°C END: 3 gram of water vapor at 110°C Change Heat ratio Change Required heat Required heat Heat ratio Total Total
||| Identifying phase transitions on a heating curve A pure solid sample of Substance X is put into an evacuated flask. The flask is heated at a steady rate and the temperature recorded as time passes. Here is graph of the results: temperature (°C) 80. Explanation 60. 80°F Mostly cloudy 40. 20. 0. -20. What is the melting point of X ? 0. Use this graph to answer the following questions: Check 10. 20. heat added (kJ/mol) °C 30. (check all that annly). Q Search LDLC 4/5 © 2023 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center IMO